Radiator-joint.



A. W. WALKER.

RADIATOR JOINT.

APPLICATION TILED 13110.2, 1912.

1,108,532, Patented Aug-25,1914.

1 THE .JvRRIS PETERS CO7, PHnTzrL/THQ, WASHINGTON. u. C,

' gig/W W. M

j UNITED STATES PATENT OFFICE.

ARTHUR-W. WALKER, OF MALDEN, MASSACHUSETTS.

RADIATOR-JOINT.

.SpecificationofiLettersPatenca Patented Aug. 25,1914.

Applicatidiifilcd December 2,1912. ser al No. 734,512.

To all whom may concern Be it known thatI, ARTHUR V. l/VALKER, acitizen of the United )States, residing at Maiden, in the county or Middlesex and State of Massachusetts, have invented new and useful Improvements 1; in Radiator here shown as it may be applied to, a

"adiator in the fornioi" anannularchamber through Which thehot gasespass on their "Way to the chimney flue. Such chambers are commonly made with cast iron tops and bottoms, and with'sheet iron Walls, these parts being held together byyery long bolts which run through from top to bottom, clamping the top and bottom tightly upon the edges of the intervening sheet metal. The strength which is contributed to this structure by the bolts hasbeen deemed necessary because of the stresses to. Which the part is siibjected during shipment to the place of installation, and during installation; and yet the bolts are objectionable because if drawn tight they are liable to snap under the influence of changes of temperature, While if left loose they fail of accomplishing their purpose, and also permit the putty with which the cracks are packed to Work loose, thus letting the gases ofcom bustion escape from the radiator into the surroundingair Which is to be used forhcatinp; the house. I is the object of the present inventionto perfect radiators of the type described by providing such a construction andjointof the sheet metal Walls and cast iron topsand bottoms that the structure as a Whole is thoroughly strong Without the use of bolts;

and is thinoughly tight because a location' is provided for putty, and mechanical means for holding: it in place, such thatthe putty cannot escape, and remains as a fil ler even though it lose its characteristic grip on the adjacent metal.

The a ccoin an in drz twin s illustrate an .i h h V embodiment of the invention, in Which- Figure l is iajsection tl u oupjh a corner oi the radiator showing the improved construction of 'j oiiit; 2 is a diagrammatic elevation of a hotairheater, showing the joint applied thereto and showing the gem jeral relation otparts; and Fin. 3 is an eleration insectioirotthe radiator itself, the

dimensions ated :t' clof certain parts being exa -erlleiferi. up," to the drawinggl ig. 2 shows a hot air heater or furnace which may be considered as being of any ordinaryor desired type, in wh ch) 20 indicates the grate and 21 the fire-box, to which fuel is, intro+ bustion to pass from the fire-box into the radiator; and adischarge pipe at 26 for these same gases to pass to the smoke pipe leading to the chimney line, after communicating; some of their heat to the radiator walls, whence it is radiated into the air in the surroiuiding chamber Referring now to Fig. 3 it Wlll be seen that theradiator is com )oscd of a rim-- t? dated l zluroug'h the door 22, the ashesloeine,

shaped bottom 27 which rests on the top of l the lire-box 21, Fig. 2, and a similarly shaped top 28, there being; a yertical cylindrical piece of sheet metalQQ forming the inside Wall or the radiator and a sim lar plece 30 forming the outside Wall of the? radiator. 'llhesc two are C(mOQIltl'lCCYllllClBI'S resting on the lower casting upper casting 28. y

Referring now 110.1 1 here thestruc ture is seen ingreater detail, it will be eb- 27 and supporting the served thatthe cast iron top has a relatively heavy rim 31 projecting downward, and that the upper portion of the standing sheet metal isbcntoutward at 10 so that aledge formed on which rests the lower edge of the de aending rim Slot the. top. This bendj outward is soshort that the rim 31 rests practically Vertically eyeithe upright portion of the cylindrical wall. 30 of sheet metal. It cannot slip either inward oiout: Ward from this posltion because of the circular form of the higher parts of the sheet metal which rise above and surround the depending rim 31. The outer face of the rim 31 is shaped inward to form an annular recess as at 32. Above the recess it is shaped outward again as at 33; and still higher it is shaped inward to form the top of the piece 28. The sheet metal, having been bent outward to form the ledge 10, is next higher bent slightly farther outward in a conical form as at 11, going straight past the recess 32 and bearing against the part 33 higher up; and still higher it is bent inward over the top 28 as at 12. By this construction the rim .31 of the top is incased above and below, at 12 and at "10, by the sheet metal; and as these holding portions 10, 12, of the sheet metal have considerable length, equaling the entire circumference of the casting 28, the intensity of stress imposed by the casting thereon is relatively low, in case of any stress arising, either downward or upward, because it is spread over so much of the area of sheet metal. Moreover, any such stress applied, for instance, at 10 is applied merely edgewise to the main body of sheet metal 30 so that there is a large depth of metal in the direction in which the stress is applied. In fact, a very heavy stress can be applied downward on the rim 31 without collapsing the shell 30 so long as it retains its cylindrical shape. As there is no occasion, in practice, for the shell 30 to be dented orknocked out of cylindrical form it ordinarily retains this strength throughout its life. So likewise, in case of any stress arising in the opposite direction, the lip 12 of the sheet metal has been bent over upon the top 28 by a mallet or other suitable forming tool; and being bent down tight constitutes so short a stub or hook that it is adequate to resist any upward stresses that are apt to happen that would tend to loosen the top 28, such stresses being transmitted as tensile stresses through the part 11 to the part 10 and 30 of the sheet metal, and being transmitted through a practically straight part 11, which consequently is not deformed no matter how great the tensile stress may become. If the part 10 is deformed by such stress no injury of importance will result, owing to the putty filling. The rim 31 fitting down on the ledge 10, and the flange l2 fitting down on the rim 31 .co6perate to make a rather tight metallic connection with a double seal to prevent leakage of gases from the inside of cylinder 30 out between it and the top 28 into the air chamber '19 of the heater; but the invention comprises another feature which makes this wall tight with certainty. This is the provision of the recess 32 and the inclosing of it by the straight conical section of the sheet metal 11, and the filling of this space between 32 and 11 with putty or'other suitable calking material. 13.

In the calking of radiator joints mere adhesion between the putty and the two surfaces of a. crack is ordinarily reliedupon, the putty being free to fall out if it gets loose, as in fact it does more or less with lapse of time, so that old furnaces or hot air heaters traditionally emit coal gas and other ofiensive gases into the air which is distributed to the living rooms of a house. In the present construction the grip of the putty may be lost entirely either owing to disintegration or ,owing to the shocks received by the radiator in handling, in transit, or in installation, and yet that putty is held mechanically in place above the ledge 10 and below the projection 33 so that gases cannot blow through from the radiator into the space outside; and this putty receptacle is maintained tightly closed by the bending of the lip 12 above it over the rim projection 33. In fact, however, the lip 12 prevents the rim 31 Land putty holding wall 32 from shifting upward with respect to the sheet iron -11,and the ledge 10 prevents them from shifting downward, so that any shocks that are received during transportation and handling do not destroy the hold which theputty has on surfaces 11' and 32 and the radiator can enter upon its term of service after being installed in as good condition as 'when the joint was made at the factory. I

The manufacturing process consists in first forming the ledge 10, then in filling or calking the recess 32 and bending the portion 11 up to close it and then fastening the whole by hammering the annular lip 12 down in place with a mallet. A similar joint is made at each end of each cylinder. The radiator as a whole is thus free from bolts, and yet is stronger and tighter, and less changeable under handling or with lapse of time, than any construction of boltfastened radiator known to me.

I claim:

' 1. A joint for radiators, comprising a cast metal end piece, formed with a recess in its outer side; and a sheet metal side having its end portion bent to form a ledge on which the end piece rests and extended to cover the outer side of said end piece and terminating in a lip bent over the end piece; and calking material filling said recess in the end piece and inclosed by the sheet metal extending over the outer side of the end piece.

2. A joint for radiators, comprising a round thin cast metal end piece, formed with a thick marginal rim with a recess in it outer side; and a cylindrical sheet metal side having its end portion bent to form a ledge on which said rim rests and extended to cover the outer side of said rim and ten minating in a lip bent over the said rim; and calking material filling said recess in the rim andinclosed by the sheet metal exlocated approximately at its periphery; a

sheet metal side piece having its end portion bent to form a ledge, 011 Which the said end piece rests approximately at its said periphery, and extended to cover the said recess and periphery, and to engage the said end piece adjacent to said periphery, to hold said end piece in place; and calking material filling said reces and inclosed by the sheet metal extending over it.

S'gned by me at Boston, Mass, this 15 tWenty-seventh day of November, 1912.

ARTHUR W. WALKER. Witnesses:

EVERETT E. KENT, J osarr-r T. BRENNAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents,

Washington, D. G. 

